Rajasthan Polytechnic Third Year Paper 2016 – Component Design & Estimation

Rajasthan Polytechnic Third Year Paper 2016 – Component Design & Estimation

The resistance to fatigue of a material is measured by
(a) Elatic limit
(b) Young’s Modulus
(c) Ultimate tensile strength
(d) Endurance limit

Factor of safety for fatigue loading is the ratio of
(a) Elastic limit and working stress
(b) Young’s modulus and ultimate tensile strength
(c) Endurance limit and working stress
(d) Elastic limit and yield point

Stress concentration is caused due to
(a) Variations in load acting on a member
(b) Variations in properties of materials in a number
(c) Abrupt change of cross section
(d) All of these

The factor of Basic series R10 of preferred numbers is
(a) 1.26
(b) 1.06
(c) 1.12
(d) 1.58

In transverse fillet welded joint, the size of weld is equal to
(a) 0.5 x throat of weld
(b) Throat of weld
(c) 1.44 x throat of weld
(d) 2 x troat of weld

The parallel fillet welded joint is designed for
(a) Tensile strength
(b) Compressive strength
(c) Bending strength
(d) Shear strength

A bolt of M 24 x 2 size means that
(a) the pitch of thread is 24 mm and depth is 2 mm
(b) The cross section area of thread is 24 sq.mm
(c) the nominal diameter of bolt is 24 mm and the pitch is 2 mm
(d) the effective diameter of bolt is 24 mm and there are two threads per mm

A bolt of uniform strength can be developed by
(a) keeping the core diameter of threads equal to the diameter of unthreaded portion of bolt (shank)
(b) keeping the core diameter of threads smaller than the diameter of untrheaded portion of the bolt (shank)
(c) keeping the nominal diameter of threads equal to the diametr of unthreaded portion of belt (shank)
(d) None of the above

A cotter joint is used to transmit
(a) axial tensile load only
(b) axial compressive load only
(c) combined axial and twisting loads
(d) axial tensile & compressive loads

The tapper in cotter varies from
(a) 1 in 15 to 1 in 10
(b) 1 in 24 to 1 in 20
(c) 1 in 32 to 1 in 24
(d) 1 in 48 to 1 in 24